{"product_id":"heavy-duty-3-4-clutch-backing-plate-kit","title":"Heavy Duty 3-4 Clutch Backing Plate Kit","description":"\n\u003ch2 class=\"light\"\u003e\u003cstrong\u003eRequires ’87-later housing, snap ring and ring gear and ’91-later 3-4 apply ring stamped with number “7”, measuring 3.671–3.682\" in height.\u003c\/strong\u003e\u003c\/h2\u003e\n\n\u003cdiv class=\"spaced-vertical\"\u003e\n\u003cp\u003eA thin, weak backing plate is the leading cause of 3-4 clutch distortion and burnup – a pervasive problem in listed GM transmissions. Even the thickest OE backing plate flexes during clutch apply, allowing heat to build up unevenly, causing problems in daily drivers and mid-level street\/strip vehicles alike.\u003c\/p\u003e\n\n\u003cp\u003eOther aftermarket solutions typically employ a thinner backing plate, and thinner steels which ultimately exacerbate the problem.\u003c\/p\u003e\n\n\u003cp\u003eSonnax heavy duty 3-4 clutch backing plate kit 74140-01K significantly reduces backing plate flex for increased 3-4 clutch durability. It features a significantly thicker and stiffer backing plate, used together with a thinner (yet stiffer) apply plate.\u003c\/p\u003e\n\n\u003cp\u003eDesigned for use with GM high energy clutch pack with seven .067\" frictions and six .095\" steels, this kit can be used to upgrade OE 700-R4 and 4L60-E five-friction or six-friction clutch packs to seven frictions, or to improve stock, seven-friction clutch packs in 4L65-E and 4L70-E units by reducing backing plate flex.\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003eBacking plate is significantly thicker and stiffer than OE for added durability\u003c\/li\u003e\n\u003cli\u003eDrop-in, mid-level upgrade for daily drivers and mild street\/strip applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c\/div\u003e\n\u003cdiv class=\"part-accordion cb spaced-vertical\"\u003e\n\u003cp\u003e\u003cstrong\u003e\u003clabel for=\"components-panel\"\u003eContents:\u003c\/label\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv class=\"accordion-content\"\u003e\n\u003cul\u003e\n\u003cli\u003eBacking Plate\u003c\/li\u003e\n\u003cli\u003eApply Plate\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e \u003c!-- suncoast-documents:start --\u003e\u003cdiv class=\"suncoast-product-documents\"\u003e\n\u003ch3 class=\"h6\"\u003eDocuments\u003c\/h3\u003e\n\u003cul\u003e\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0832\/4173\/0267\/files\/184125.pdf?v=1793635160\" target=\"_blank\" rel=\"noopener\"\u003eInstructions\u003c\/a\u003e\u003c\/li\u003e\u003c\/ul\u003e\n\u003c\/div\u003e\u003c!-- suncoast-documents:end --\u003e","brand":"Sonnax","offers":[{"title":"Default Title","offer_id":49129564602587,"sku":"74140-01K","price":389.43,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0832\/4173\/0267\/files\/F198655702.jpg?v=1786546977","url":"https:\/\/suncoastperformance.com\/products\/heavy-duty-3-4-clutch-backing-plate-kit","provider":"SunCoast Diesel","version":"1.0","type":"link"}